I need to replace a hard drive in an older Gateway computer and would like to know if Gateway has their own special architecture that makes it more difficult?

I tried once to replace the modem in it and me and the replacement modem company's support could not get it to work after many hours of trying. I finally took it to Gateway and they put in the exact same modem I tried and naturally it now works fine. The jumper thing and being a software driven modem seemed to be to much for support.

Thanks Am-O-Tramp

It should not be a problem.  How old is this gateway?  You may have to be careful partitioning the HD when you install it to get the full capability of the drive.  The first time I swapped an HD I did not and later had to format it and re-partition, and obviously reinstall everything in the process.  Before you actually do the swap make sure you have all your software.  You'll need all your drivers for modem, soundcard, CD-Rom et. al.  As well as your OS, win 98 or whatever you want to run and MS office.  But as far as it being a Gateway and doing the switch should not be a problem.